John Gilmer wrote:
normal gas line pressure is only a couple psi.


If that!

Gas pressure is usually measured in "Inches of Water."

30' of water is about 15 psi. 1 psi is about 2' or 24" of water.




** Posted from http://www.teranews.com **
Hi,
Are you sure 1 psi = 2 feet of water column?